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| 润滑油孔 | |||
| 油孔 | |||
| 注油孔 | |||
| 油位表 | |||
| 油眼 | |||
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| 注油孔 | |||
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| 油孔 | |||
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oil hole : 42 phrases in 13 subjects |
| Automobiles | 7 |
| Biology | 1 |
| Chemistry | 1 |
| Compressors | 4 |
| Drilling | 3 |
| Earth sciences | 3 |
| Electric machinery | 1 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Mining | 1 |
| Oil / petroleum | 4 |
| Shipbuilding | 2 |
| Technology | 13 |
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